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Connecting device for abrasive extrusion grinding in oil duct hole and nozzle hole of needle valve body

A technology of extrusion grinding and connecting device, applied in the field of mechanical processing, can solve the problems of reduced machine tool processing performance, weakened pressure, low practicability, etc., and achieves the effects of expanding processing range, improving atomization performance, and strong practicability

Inactive Publication Date: 2018-04-10
STATE RUN NO 616 FACTORY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] 2. Low practicability and poor wear resistance: the rubber gasket in the connecting element is a key seal, which belongs to elastic material and has low hardness
When the quality of the sealing end face decreases, the liquid abrasive of the machine tool will overflow from between the connecting element and the sealing end face, the pressure acting on the nozzle hole will weaken, the flow rate of the liquid abrasive will decrease per unit time, and the machining performance of the machine tool will decrease

Method used

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  • Connecting device for abrasive extrusion grinding in oil duct hole and nozzle hole of needle valve body
  • Connecting device for abrasive extrusion grinding in oil duct hole and nozzle hole of needle valve body
  • Connecting device for abrasive extrusion grinding in oil duct hole and nozzle hole of needle valve body

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Embodiment Construction

[0037] In order to make the purpose, content, and advantages of the present invention clearer, the specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0038] Such as Figure 4 and Figure 5 As shown, the connection device of this embodiment is arranged between the base and the pressure head of the hydraulic grinding and extrusion machine tool, the top and the pressure head are sealed by a rubber gasket, and the bottom is connected to the needle valve body.

[0039] Specifically, as Figure 6 to Figure 8 As shown, the connection device of this embodiment includes three parts: positioning sleeve 3, liquid valve 1 and pin 2. The positioning sleeve 3 is cylindrical. The top of the body is embedded in the lower part of the positioning sleeve 3 and docked with the liquid valve. The pin 2 passes through the positioning sleeve 3 and the liquid valve 1 from the side and fix...

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Abstract

The invention discloses a connecting device for abrasive extrusion grinding in an oil duct hole and a nozzle hole of a needle valve body. The connecting device comprises three parts, namely, a locating sleeve (3), a liquid passing valve (1) and a pin (2); the locating sleeve (3) is cylindrical; the liquid passing valve (1) is located at the upper part of the locating sleeve (3) and protrudes out of the top end of the locating sleeve (3); the top end of the needle valve body is embedded into the lower part of the locating sleeve (3) and is in butt joint with the liquid passing valve (1); the pin (2) penetrates through the locating sleeve (3) and the liquid passing valve (1) from the side surface and fix the locating sleeve (3) and the liquid passing valve (1) together ; the locating sleeve(3) is used for fixing and clamping the excircle of the needle valve body; and the liquid passing valve (1) is used for accurately guiding the flow direction of an abrasive flow. The abrasive flow isguided into the high-pressure oil duct hole of the needle valve body and carries out extrusion grinding on the hole wall of the high-pressure oil duct hole fully, so that the surface quality of the hole wall is improved, adverse factors which affect the flow coefficient of the nozzle hole are removed, the preset machining flow value is achieved, and the atomization performance of an oil nozzle isimproved.

Description

technical field [0001] The invention belongs to the technical field of mechanical processing, and relates to an oil passage hole of a needle valve body and a nozzle hole abrasive extrusion grinding connection device. Background technique [0002] The fuel injector is one of the important components in the fuel system of a diesel engine, which plays an important role in the power performance, fuel economy and emission indicators of the diesel engine. The nozzle flow coefficient is an important index to evaluate the quality of the fuel injector, and the value of this value directly affects the spray characteristics of the fuel, thus having an important impact on the performance of the diesel engine. The nozzle flow coefficient is the ratio of the actual injection volume of the injection hole to the ideal injection volume, which is measured in a steady state. Reducing the flow resistance of fuel in the injector is conducive to improving the atomization effect. Abrasive extrus...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B24C1/08B24C3/32
CPCB24C1/083B24C3/327
Inventor 吴建华郭巨寿张雪冬张宝荣赵志勇
Owner STATE RUN NO 616 FACTORY
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